The basic limit for the position measuring was analyzed with the photoelectric signal model.
利用位置传感的光电信号模型，分析了光学传感器位置测量精度的基本限制。
Open - close position indicator. Limit switches for remote indication.
开启-关闭位置指示器。适用于远程指示的限制开关。
Valve position high limit and valve position low limit setting.
阀位上限幅值和阀位上限幅值设定。
Valve position high limit and valve position low limit setting.
阀位上限幅值和阀位上限幅值设定。
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